139087871 has 8 divisors (see below), whose sum is σ = 150263904. Its totient is φ = 127980000.

The previous prime is 139087859. The next prime is 139087873. The reversal of 139087871 is 178780931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139087871 - 2¹⁸ = 138825727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139087873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12755 + ... + 20996.

It is an arithmetic number, because the mean of its divisors is an integer number (18782988).

Almost surely, 2^139087871 is an apocalyptic number.

139087871 is a deficient number, since it is larger than the sum of its proper divisors (11176033).

139087871 is a wasteful number, since it uses less digits than its factorization.

139087871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34081.

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 139087871 is about 11793.5520942590. The cubic root of 139087871 is about 518.1192797868.

The spelling of 139087871 in words is "one hundred thirty-nine million, eighty-seven thousand, eight hundred seventy-one".